CN110899327A - Process method for solving problem that maximum clearance at tail end of transverse rib of phi 8mm spiral shell exceeds standard - Google Patents
Process method for solving problem that maximum clearance at tail end of transverse rib of phi 8mm spiral shell exceeds standard Download PDFInfo
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- CN110899327A CN110899327A CN201911143846.XA CN201911143846A CN110899327A CN 110899327 A CN110899327 A CN 110899327A CN 201911143846 A CN201911143846 A CN 201911143846A CN 110899327 A CN110899327 A CN 110899327A
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- China
- Prior art keywords
- tail end
- phi
- process method
- maximum clearance
- transverse rib
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/22—Pass schedule
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention relates to the technical field of steel rolling, in particular to a process method for solving the problem that the maximum clearance at the tail end of a phi 8mm spiral cross rib exceeds the standard, which comprises the following process steps: firstly, changing the inner diameter of a finished hole pattern of a rolling mill roll collar to change the radius of the finished hole pattern from original 3.61mm to 3.71 mm; and secondly, lengthening the length of the PCD cutter for engraving the roll collar, so that the length of the PCD cutter is adjusted to 6.1mm from the original 5.8 mm. The maximum clearance at the tail end of the transverse rib of the phi 8mm disc spiral rolled by the process method provided by the invention meets the national standard.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a process method for solving the problem that the maximum clearance at the tail end of a phi 8mm spiral cross rib exceeds the standard.
Background
In recent years, the market demand for construction steel has been sharply increased by large-scale infrastructure and urbanization, in which hot-rolled steel bars are the most demanding type of construction steel. Due to the strong market demand, the annual production of hot rolled steel bars continues to increase. After the new national standard of GB/T1499.2-2018 is implemented, the maximum gap at the tail end of the transverse rib is used as a necessary test item in the new standard, and the maximum gap at the tail end of the transverse rib with the diameter of 8mm of the spiral shell is frequently beyond the national standard after being tested.
Disclosure of Invention
The invention aims to solve the technical problem of providing a process method for solving the problem that the maximum clearance at the tail end of a phi 8mm cross rib of a disc screw exceeds the standard.
The invention is realized by the following technical scheme:
a process method for solving the problem that the maximum clearance at the tail end of a phi 8mm spiral cross rib exceeds the standard comprises the following process steps:
firstly, changing the inner diameter of a finished hole pattern of a rolling mill roll collar to change the radius of the finished hole pattern from original 3.61mm to 3.71 mm;
and secondly, lengthening the length of the PCD cutter for engraving the roll collar, so that the length of the PCD cutter is adjusted to 6.1mm from the original 5.8 mm.
The invention has the advantages of
The invention protects a process method for solving the problem that the maximum clearance at the tail end of a phi 8mm disc spiral transverse rib exceeds the standard, the inner diameter of a finished hole pattern of a rolling mill roll ring is adjusted to change the radius of the finished hole pattern from the original 3.61mm to 3.71mm, the length of a PCD cutter for engraving the roll ring is lengthened to adjust the original 5.8mm to 6.1mm, the finished hole pattern of the processed roll ring can be ensured to meet the requirement of the hole diameter, and the clearance at the tail end of the phi 8mm disc spiral transverse rib meets the requirement of the national standard.
Drawings
FIG. 1 is a schematic diagram of the finished pass of a roll collar of a rolling mill;
Detailed Description
A process method for solving the problem that the maximum clearance at the tail end of a phi 8mm spiral cross rib exceeds the standard comprises the following process steps:
firstly, changing the inner diameter of a finished hole pattern of a rolling mill roll collar to change the radius of the finished hole pattern from original 3.61mm to 3.71 mm; the tail end gap of the cross rib of the disc spiral with the diameter of 8mm can be reduced, so that the disc spiral meets the national standard requirement.
Secondly, the length of a PCD cutter for engraving the roll collar is lengthened, the original 5.8mm is adjusted to 6.1mm, and the finished hole pattern of the machined roll collar is further ensured to meet the requirement of the hole diameter, so that the tail end gap of the phi 8mm cross rib of the disc screw meets the national standard requirement, and the specific test data are shown in the following table:
the test data before adjustment is shown in the following table:
the two values of the transverse rib tail end clearance are measured from different positions on two sides, and the comparison of the data of the two tables shows that the maximum clearance of the tail end of the phi 8mm spiral shell transverse rib rolled before the method is adopted exceeds 2.5mm specified by the national standard, and the adjusted maximum clearance of the tail end of the phi 8mm spiral shell transverse rib rolled conforms to the national standard.
In conclusion, the maximum clearance at the tail end of the transverse rib of the phi 8mm disc spiral rolled by the process method for solving the problem that the maximum clearance at the tail end of the transverse rib of the phi 8mm disc spiral exceeds the standard meets the national standard.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A process method for solving the problem that the maximum clearance at the tail end of a transverse rib of a disc spiral with the diameter of phi 8mm exceeds the standard is characterized by comprising the following process steps:
firstly, changing the inner diameter of a finished hole pattern of a rolling mill roll collar to change the radius of the finished hole pattern from original 3.61mm to 3.71 mm;
and secondly, lengthening the length of the PCD cutter for engraving the roll collar, so that the length of the PCD cutter is adjusted to 6.1mm from the original 5.8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911143846.XA CN110899327A (en) | 2019-11-20 | 2019-11-20 | Process method for solving problem that maximum clearance at tail end of transverse rib of phi 8mm spiral shell exceeds standard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911143846.XA CN110899327A (en) | 2019-11-20 | 2019-11-20 | Process method for solving problem that maximum clearance at tail end of transverse rib of phi 8mm spiral shell exceeds standard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110899327A true CN110899327A (en) | 2020-03-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911143846.XA Pending CN110899327A (en) | 2019-11-20 | 2019-11-20 | Process method for solving problem that maximum clearance at tail end of transverse rib of phi 8mm spiral shell exceeds standard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110899327A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7614602A (en) * | 1973-07-26 | 1978-07-04 | Tetracero Sa | SYSTEM FOR COLD DEFORMING CONCRETE STEEL. |
| CN103752606A (en) * | 2014-01-07 | 2014-04-30 | 山西太钢不锈钢股份有限公司 | Method for eliminating stainless steel deformed bar transverse rib cracks |
| CN107470725A (en) * | 2017-10-09 | 2017-12-15 | 湖南三泰新材料股份有限公司 | A kind of compound electrode for being used to process screw-thread steel roll transverse rib |
| CN111191338A (en) * | 2019-11-21 | 2020-05-22 | 张家港宏昌钢板有限公司 | Method for preventing transverse rib in equal-rib-height steel bar from cracking due to stress concentration |
-
2019
- 2019-11-20 CN CN201911143846.XA patent/CN110899327A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7614602A (en) * | 1973-07-26 | 1978-07-04 | Tetracero Sa | SYSTEM FOR COLD DEFORMING CONCRETE STEEL. |
| CN103752606A (en) * | 2014-01-07 | 2014-04-30 | 山西太钢不锈钢股份有限公司 | Method for eliminating stainless steel deformed bar transverse rib cracks |
| CN107470725A (en) * | 2017-10-09 | 2017-12-15 | 湖南三泰新材料股份有限公司 | A kind of compound electrode for being used to process screw-thread steel roll transverse rib |
| CN111191338A (en) * | 2019-11-21 | 2020-05-22 | 张家港宏昌钢板有限公司 | Method for preventing transverse rib in equal-rib-height steel bar from cracking due to stress concentration |
Non-Patent Citations (2)
| Title |
|---|
| 吴昊等: ""带肋钢筋孔型设计与横肋加工参数选择及分析"", 《轧钢》 * |
| 杨南方等: "《住宅工程质量通病防治手册 第2版》", 31 May 2002 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200324 |
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| RJ01 | Rejection of invention patent application after publication |